src/login/logind-dbus.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2011 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <errno.h>
  21 #include <pwd.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 #include "sd-messages.h"
  26
  27 #include "alloc-util.h"
  28 #include "audit-util.h"
  29 #include "bus-common-errors.h"
  30 #include "bus-error.h"
  31 #include "bus-util.h"
  32 #include "dirent-util.h"
  33 //#include "efivars.h"
  34 #include "escape.h"
  35 #include "fd-util.h"
  36 #include "fileio-label.h"
  37 #include "format-util.h"
  38 #include "fs-util.h"
  39 #include "logind.h"
  40 #include "mkdir.h"
  41 #include "path-util.h"
  42 #include "process-util.h"
  43 #include "selinux-util.h"
  44 #include "sleep-config.h"
  45 //#include "special.h"
  46 #include "strv.h"
  47 #include "terminal-util.h"
  48 #include "udev-util.h"
  49 #include "unit-name.h"
  50 #include "user-util.h"
  51 #include "utmp-wtmp.h"
  52
  53 /// Additional includes needed by elogind
  54 #include "elogind-dbus.h"
  55 //#include "update-utmp.h"
  56
  57 int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
  58         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  59         Session *session;
  60         int r;
  61
  62         assert(m);
  63         assert(message);
  64         assert(ret);
  65
  66         if (isempty(name)) {
  67                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
  68                 if (r < 0)
  69                         return r;
  70
  71                 r = sd_bus_creds_get_session(creds, &name);
  72                 if (r < 0)
  73                         return r;
  74         }
  75
  76         session = hashmap_get(m->sessions, name);
  77         if (!session)
  78                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
  79
  80         *ret = session;
  81         return 0;
  82 }
  83
  84 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
  85         User *user;
  86         int r;
  87
  88         assert(m);
  89         assert(message);
  90         assert(ret);
  91
  92         if (uid == UID_INVALID) {
  93                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  94
  95                 /* Note that we get the owner UID of the session, not the actual client UID here! */
  96                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
  97                 if (r < 0)
  98                         return r;
  99
 100                 r = sd_bus_creds_get_owner_uid(creds, &uid);
 101                 if (r < 0)
 102                         return r;
 103         }
 104
 105         user = hashmap_get(m->users, UID_TO_PTR(uid));
 106         if (!user)
 107                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "No user "UID_FMT" known or logged in", uid);
 108
 109         *ret = user;
 110         return 0;
 111 }
 112
 113 int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) {
 114         Seat *seat;
 115         int r;
 116
 117         assert(m);
 118         assert(message);
 119         assert(ret);
 120
 121         if (isempty(name)) {
 122                 Session *session;
 123
 124                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 125                 if (r < 0)
 126                         return r;
 127
 128                 seat = session->seat;
 129                 if (!seat)
 130                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat.");
 131         } else {
 132                 seat = hashmap_get(m->seats, name);
 133                 if (!seat)
 134                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 135         }
 136
 137         *ret = seat;
 138         return 0;
 139 }
 140
 141 static int property_get_idle_hint(
 142                 sd_bus *bus,
 143                 const char *path,
 144                 const char *interface,
 145                 const char *property,
 146                 sd_bus_message *reply,
 147                 void *userdata,
 148                 sd_bus_error *error) {
 149
 150         Manager *m = userdata;
 151
 152         assert(bus);
 153         assert(reply);
 154         assert(m);
 155
 156         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 157 }
 158
 159 static int property_get_idle_since_hint(
 160                 sd_bus *bus,
 161                 const char *path,
 162                 const char *interface,
 163                 const char *property,
 164                 sd_bus_message *reply,
 165                 void *userdata,
 166                 sd_bus_error *error) {
 167
 168         Manager *m = userdata;
 169         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 170
 171         assert(bus);
 172         assert(reply);
 173         assert(m);
 174
 175         manager_get_idle_hint(m, &t);
 176
 177         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 178 }
 179
 180 static int property_get_inhibited(
 181                 sd_bus *bus,
 182                 const char *path,
 183                 const char *interface,
 184                 const char *property,
 185                 sd_bus_message *reply,
 186                 void *userdata,
 187                 sd_bus_error *error) {
 188
 189         Manager *m = userdata;
 190         InhibitWhat w;
 191
 192         assert(bus);
 193         assert(reply);
 194         assert(m);
 195
 196         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 197
 198         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 199 }
 200
 201 static int property_get_preparing(
 202                 sd_bus *bus,
 203                 const char *path,
 204                 const char *interface,
 205                 const char *property,
 206                 sd_bus_message *reply,
 207                 void *userdata,
 208                 sd_bus_error *error) {
 209
 210         Manager *m = userdata;
 211         bool b;
 212
 213         assert(bus);
 214         assert(reply);
 215         assert(m);
 216
 217         if (streq(property, "PreparingForShutdown"))
 218                 b = !!(m->action_what & INHIBIT_SHUTDOWN);
 219         else
 220                 b = !!(m->action_what & INHIBIT_SLEEP);
 221
 222         return sd_bus_message_append(reply, "b", b);
 223 }
 224
 225 static int property_get_scheduled_shutdown(
 226                 sd_bus *bus,
 227                 const char *path,
 228                 const char *interface,
 229                 const char *property,
 230                 sd_bus_message *reply,
 231                 void *userdata,
 232                 sd_bus_error *error) {
 233
 234         Manager *m = userdata;
 235         int r;
 236
 237         assert(bus);
 238         assert(reply);
 239         assert(m);
 240
 241         r = sd_bus_message_open_container(reply, 'r', "st");
 242         if (r < 0)
 243                 return r;
 244
 245         r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_type, m->scheduled_shutdown_timeout);
 246         if (r < 0)
 247                 return r;
 248
 249         return sd_bus_message_close_container(reply);
 250 }
 251
 252 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 253
 254 static int property_get_docked(
 255                 sd_bus *bus,
 256                 const char *path,
 257                 const char *interface,
 258                 const char *property,
 259                 sd_bus_message *reply,
 260                 void *userdata,
 261                 sd_bus_error *error) {
 262
 263         Manager *m = userdata;
 264
 265         assert(bus);
 266         assert(reply);
 267         assert(m);
 268
 269         return sd_bus_message_append(reply, "b", manager_is_docked_or_external_displays(m));
 270 }
 271
 272 static int property_get_current_sessions(
 273                 sd_bus *bus,
 274                 const char *path,
 275                 const char *interface,
 276                 const char *property,
 277                 sd_bus_message *reply,
 278                 void *userdata,
 279                 sd_bus_error *error) {
 280
 281         Manager *m = userdata;
 282
 283         assert(bus);
 284         assert(reply);
 285         assert(m);
 286
 287         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->sessions));
 288 }
 289
 290 static int property_get_current_inhibitors(
 291                 sd_bus *bus,
 292                 const char *path,
 293                 const char *interface,
 294                 const char *property,
 295                 sd_bus_message *reply,
 296                 void *userdata,
 297                 sd_bus_error *error) {
 298
 299         Manager *m = userdata;
 300
 301         assert(bus);
 302         assert(reply);
 303         assert(m);
 304
 305         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->inhibitors));
 306 }
 307
 308 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 309         _cleanup_free_ char *p = NULL;
 310         Manager *m = userdata;
 311         const char *name;
 312         Session *session;
 313         int r;
 314
 315         assert(message);
 316         assert(m);
 317
 318         r = sd_bus_message_read(message, "s", &name);
 319         if (r < 0)
 320                 return r;
 321
 322         r = manager_get_session_from_creds(m, message, name, error, &session);
 323         if (r < 0)
 324                 return r;
 325
 326         p = session_bus_path(session);
 327         if (!p)
 328                 return -ENOMEM;
 329
 330         return sd_bus_reply_method_return(message, "o", p);
 331 }
 332
 333 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 334         _cleanup_free_ char *p = NULL;
 335         Session *session = NULL;
 336         Manager *m = userdata;
 337         pid_t pid;
 338         int r;
 339
 340         assert(message);
 341         assert(m);
 342
 343         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 344
 345         r = sd_bus_message_read(message, "u", &pid);
 346         if (r < 0)
 347                 return r;
 348         if (pid < 0)
 349                 return -EINVAL;
 350
 351         if (pid == 0) {
 352                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 353                 if (r < 0)
 354                         return r;
 355         } else {
 356                 r = manager_get_session_by_pid(m, pid, &session);
 357                 if (r < 0)
 358                         return r;
 359
 360                 if (!session)
 361                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid);
 362         }
 363
 364         p = session_bus_path(session);
 365         if (!p)
 366                 return -ENOMEM;
 367
 368         return sd_bus_reply_method_return(message, "o", p);
 369 }
 370
 371 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 372         _cleanup_free_ char *p = NULL;
 373         Manager *m = userdata;
 374         uint32_t uid;
 375         User *user;
 376         int r;
 377
 378         assert(message);
 379         assert(m);
 380
 381         r = sd_bus_message_read(message, "u", &uid);
 382         if (r < 0)
 383                 return r;
 384
 385         r = manager_get_user_from_creds(m, message, uid, error, &user);
 386         if (r < 0)
 387                 return r;
 388
 389         p = user_bus_path(user);
 390         if (!p)
 391                 return -ENOMEM;
 392
 393         return sd_bus_reply_method_return(message, "o", p);
 394 }
 395
 396 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 397         _cleanup_free_ char *p = NULL;
 398         Manager *m = userdata;
 399         User *user = NULL;
 400         pid_t pid;
 401         int r;
 402
 403         assert(message);
 404         assert(m);
 405
 406         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 407
 408         r = sd_bus_message_read(message, "u", &pid);
 409         if (r < 0)
 410                 return r;
 411         if (pid < 0)
 412                 return -EINVAL;
 413
 414         if (pid == 0) {
 415                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 416                 if (r < 0)
 417                         return r;
 418         } else {
 419                 r = manager_get_user_by_pid(m, pid, &user);
 420                 if (r < 0)
 421                         return r;
 422                 if (!user)
 423                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID, "PID "PID_FMT" does not belong to any known or logged in user", pid);
 424         }
 425
 426         p = user_bus_path(user);
 427         if (!p)
 428                 return -ENOMEM;
 429
 430         return sd_bus_reply_method_return(message, "o", p);
 431 }
 432
 433 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 434         _cleanup_free_ char *p = NULL;
 435         Manager *m = userdata;
 436         const char *name;
 437         Seat *seat;
 438         int r;
 439
 440         assert(message);
 441         assert(m);
 442
 443         r = sd_bus_message_read(message, "s", &name);
 444         if (r < 0)
 445                 return r;
 446
 447         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 448         if (r < 0)
 449                 return r;
 450
 451         p = seat_bus_path(seat);
 452         if (!p)
 453                 return -ENOMEM;
 454
 455         return sd_bus_reply_method_return(message, "o", p);
 456 }
 457
 458 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 459         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 460         Manager *m = userdata;
 461         Session *session;
 462         Iterator i;
 463         int r;
 464
 465         assert(message);
 466         assert(m);
 467
 468         r = sd_bus_message_new_method_return(message, &reply);
 469         if (r < 0)
 470                 return r;
 471
 472         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 473         if (r < 0)
 474                 return r;
 475
 476         HASHMAP_FOREACH(session, m->sessions, i) {
 477                 _cleanup_free_ char *p = NULL;
 478
 479                 p = session_bus_path(session);
 480                 if (!p)
 481                         return -ENOMEM;
 482
 483                 r = sd_bus_message_append(reply, "(susso)",
 484                                           session->id,
 485                                           (uint32_t) session->user->uid,
 486                                           session->user->name,
 487                                           session->seat ? session->seat->id : "",
 488                                           p);
 489                 if (r < 0)
 490                         return r;
 491         }
 492
 493         r = sd_bus_message_close_container(reply);
 494         if (r < 0)
 495                 return r;
 496
 497         return sd_bus_send(NULL, reply, NULL);
 498 }
 499
 500 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 501         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 502         Manager *m = userdata;
 503         User *user;
 504         Iterator i;
 505         int r;
 506
 507         assert(message);
 508         assert(m);
 509
 510         r = sd_bus_message_new_method_return(message, &reply);
 511         if (r < 0)
 512                 return r;
 513
 514         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 515         if (r < 0)
 516                 return r;
 517
 518         HASHMAP_FOREACH(user, m->users, i) {
 519                 _cleanup_free_ char *p = NULL;
 520
 521                 p = user_bus_path(user);
 522                 if (!p)
 523                         return -ENOMEM;
 524
 525                 r = sd_bus_message_append(reply, "(uso)",
 526                                           (uint32_t) user->uid,
 527                                           user->name,
 528                                           p);
 529                 if (r < 0)
 530                         return r;
 531         }
 532
 533         r = sd_bus_message_close_container(reply);
 534         if (r < 0)
 535                 return r;
 536
 537         return sd_bus_send(NULL, reply, NULL);
 538 }
 539
 540 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 541         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 542         Manager *m = userdata;
 543         Seat *seat;
 544         Iterator i;
 545         int r;
 546
 547         assert(message);
 548         assert(m);
 549
 550         r = sd_bus_message_new_method_return(message, &reply);
 551         if (r < 0)
 552                 return r;
 553
 554         r = sd_bus_message_open_container(reply, 'a', "(so)");
 555         if (r < 0)
 556                 return r;
 557
 558         HASHMAP_FOREACH(seat, m->seats, i) {
 559                 _cleanup_free_ char *p = NULL;
 560
 561                 p = seat_bus_path(seat);
 562                 if (!p)
 563                         return -ENOMEM;
 564
 565                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 566                 if (r < 0)
 567                         return r;
 568         }
 569
 570         r = sd_bus_message_close_container(reply);
 571         if (r < 0)
 572                 return r;
 573
 574         return sd_bus_send(NULL, reply, NULL);
 575 }
 576
 577 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 578         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 579         Manager *m = userdata;
 580         Inhibitor *inhibitor;
 581         Iterator i;
 582         int r;
 583
 584         assert(message);
 585         assert(m);
 586
 587         r = sd_bus_message_new_method_return(message, &reply);
 588         if (r < 0)
 589                 return r;
 590
 591         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 592         if (r < 0)
 593                 return r;
 594
 595         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 596
 597                 r = sd_bus_message_append(reply, "(ssssuu)",
 598                                           strempty(inhibit_what_to_string(inhibitor->what)),
 599                                           strempty(inhibitor->who),
 600                                           strempty(inhibitor->why),
 601                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 602                                           (uint32_t) inhibitor->uid,
 603                                           (uint32_t) inhibitor->pid);
 604                 if (r < 0)
 605                         return r;
 606         }
 607
 608         r = sd_bus_message_close_container(reply);
 609         if (r < 0)
 610                 return r;
 611
 612         return sd_bus_send(NULL, reply, NULL);
 613 }
 614
 615 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 616         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 617         uint32_t audit_id = 0;
 618         _cleanup_free_ char *id = NULL;
 619         Session *session = NULL;
 620         Manager *m = userdata;
 621         User *user = NULL;
 622         Seat *seat = NULL;
 623         pid_t leader;
 624         uid_t uid;
 625         int remote;
 626         uint32_t vtnr = 0;
 627         SessionType t;
 628         SessionClass c;
 629         int r;
 630
 631         assert(message);
 632         assert(m);
 633
 634         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 635         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 636
 637         r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 638         if (r < 0)
 639                 return r;
 640
 641         if (!uid_is_valid(uid))
 642                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 643         if (leader < 0 || leader == 1)
 644                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 645
 646         if (isempty(type))
 647                 t = _SESSION_TYPE_INVALID;
 648         else {
 649                 t = session_type_from_string(type);
 650                 if (t < 0)
 651                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type);
 652         }
 653
 654         if (isempty(class))
 655                 c = _SESSION_CLASS_INVALID;
 656         else {
 657                 c = session_class_from_string(class);
 658                 if (c < 0)
 659                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class);
 660         }
 661
 662         if (isempty(desktop))
 663                 desktop = NULL;
 664         else {
 665                 if (!string_is_safe(desktop))
 666                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop);
 667         }
 668
 669         if (isempty(cseat))
 670                 seat = NULL;
 671         else {
 672                 seat = hashmap_get(m->seats, cseat);
 673                 if (!seat)
 674                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat);
 675         }
 676
 677         if (tty_is_vc(tty)) {
 678                 int v;
 679
 680                 if (!seat)
 681                         seat = m->seat0;
 682                 else if (seat != m->seat0)
 683                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "TTY %s is virtual console but seat %s is not seat0", tty, seat->id);
 684
 685                 v = vtnr_from_tty(tty);
 686                 if (v <= 0)
 687                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty);
 688
 689                 if (!vtnr)
 690                         vtnr = (uint32_t) v;
 691                 else if (vtnr != (uint32_t) v)
 692                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match");
 693
 694         } else if (tty_is_console(tty)) {
 695
 696                 if (!seat)
 697                         seat = m->seat0;
 698                 else if (seat != m->seat0)
 699                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0");
 700
 701                 if (vtnr != 0)
 702                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0");
 703         }
 704
 705         if (seat) {
 706                 if (seat_has_vts(seat)) {
 707                         if (!vtnr || vtnr > 63)
 708                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range");
 709                 } else {
 710                         if (vtnr != 0)
 711                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0");
 712                 }
 713         }
 714
 715         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 716         if (r < 0)
 717                 return r;
 718
 719         if (t == _SESSION_TYPE_INVALID) {
 720                 if (!isempty(display))
 721                         t = SESSION_X11;
 722                 else if (!isempty(tty))
 723                         t = SESSION_TTY;
 724                 else
 725                         t = SESSION_UNSPECIFIED;
 726         }
 727
 728         if (c == _SESSION_CLASS_INVALID) {
 729                 if (t == SESSION_UNSPECIFIED)
 730                         c = SESSION_BACKGROUND;
 731                 else
 732                         c = SESSION_USER;
 733         }
 734
 735         if (leader == 0) {
 736                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 737
 738                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 739                 if (r < 0)
 740                         return r;
 741
 742                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 743                 if (r < 0)
 744                         return r;
 745         }
 746
 747         r = manager_get_session_by_pid(m, leader, NULL);
 748         if (r > 0)
 749                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session");
 750
 751         /*
 752          * Old gdm and lightdm start the user-session on the same VT as
 753          * the greeter session. But they destroy the greeter session
 754          * after the user-session and want the user-session to take
 755          * over the VT. We need to support this for
 756          * backwards-compatibility, so make sure we allow new sessions
 757          * on a VT that a greeter is running on. Furthermore, to allow
 758          * re-logins, we have to allow a greeter to take over a used VT for
 759          * the exact same reasons.
 760          */
 761         if (c != SESSION_GREETER &&
 762             vtnr > 0 &&
 763             vtnr < m->seat0->position_count &&
 764             m->seat0->positions[vtnr] &&
 765             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 766                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 767
 768         if (hashmap_size(m->sessions) >= m->sessions_max)
 769                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max);
 770
 771         audit_session_from_pid(leader, &audit_id);
 772         if (audit_id > 0) {
 773                 /* Keep our session IDs and the audit session IDs in sync */
 774
 775                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 776                         return -ENOMEM;
 777
 778                 /* Wut? There's already a session by this name and we
 779                  * didn't find it above? Weird, then let's not trust
 780                  * the audit data and let's better register a new
 781                  * ID */
 782                 if (hashmap_get(m->sessions, id)) {
 783                         log_warning("Existing logind session ID %s used by new audit session, ignoring", id);
 784                         audit_id = 0;
 785
 786                         id = mfree(id);
 787                 }
 788         }
 789
 790         if (!id) {
 791                 do {
 792                         id = mfree(id);
 793
 794                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 795                                 return -ENOMEM;
 796
 797                 } while (hashmap_get(m->sessions, id));
 798         }
 799
 800         r = manager_add_user_by_uid(m, uid, &user);
 801         if (r < 0)
 802                 goto fail;
 803
 804         r = manager_add_session(m, id, &session);
 805         if (r < 0)
 806                 goto fail;
 807
 808         session_set_user(session, user);
 809
 810         session->leader = leader;
 811         session->audit_id = audit_id;
 812         session->type = t;
 813         session->class = c;
 814         session->remote = remote;
 815         session->vtnr = vtnr;
 816
 817         if (!isempty(tty)) {
 818                 session->tty = strdup(tty);
 819                 if (!session->tty) {
 820                         r = -ENOMEM;
 821                         goto fail;
 822                 }
 823         }
 824
 825         if (!isempty(display)) {
 826                 session->display = strdup(display);
 827                 if (!session->display) {
 828                         r = -ENOMEM;
 829                         goto fail;
 830                 }
 831         }
 832
 833         if (!isempty(remote_user)) {
 834                 session->remote_user = strdup(remote_user);
 835                 if (!session->remote_user) {
 836                         r = -ENOMEM;
 837                         goto fail;
 838                 }
 839         }
 840
 841         if (!isempty(remote_host)) {
 842                 session->remote_host = strdup(remote_host);
 843                 if (!session->remote_host) {
 844                         r = -ENOMEM;
 845                         goto fail;
 846                 }
 847         }
 848
 849         if (!isempty(service)) {
 850                 session->service = strdup(service);
 851                 if (!session->service) {
 852                         r = -ENOMEM;
 853                         goto fail;
 854                 }
 855         }
 856
 857         if (!isempty(desktop)) {
 858                 session->desktop = strdup(desktop);
 859                 if (!session->desktop) {
 860                         r = -ENOMEM;
 861                         goto fail;
 862                 }
 863         }
 864
 865         if (seat) {
 866                 r = seat_attach_session(seat, session);
 867                 if (r < 0)
 868                         goto fail;
 869         }
 870
 871         r = session_start(session);
 872         if (r < 0)
 873                 goto fail;
 874
 875         session->create_message = sd_bus_message_ref(message);
 876
 877 #if 0 /// UNNEEDED by elogind
 878         /* Now, let's wait until the slice unit and stuff got
 879          * created. We send the reply back from
 880          * session_send_create_reply(). */
 881 #else
 882         /* We reply directly. */
 883
 884         r = session_send_create_reply(session, NULL);
 885         if (r < 0)
 886                 goto fail;
 887 #endif // 0
 888
 889         return 1;
 890
 891 fail:
 892         if (session)
 893                 session_add_to_gc_queue(session);
 894
 895         if (user)
 896                 user_add_to_gc_queue(user);
 897
 898         return r;
 899 }
 900
 901 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 902         Manager *m = userdata;
 903         Session *session;
 904         const char *name;
 905         int r;
 906
 907         assert(message);
 908         assert(m);
 909
 910         r = sd_bus_message_read(message, "s", &name);
 911         if (r < 0)
 912                 return r;
 913
 914         r = manager_get_session_from_creds(m, message, name, error, &session);
 915         if (r < 0)
 916                 return r;
 917
 918         r = session_release(session);
 919         if (r < 0)
 920                 return r;
 921
 922 #if 1 /// elogind must queue this session
 923         session_add_to_gc_queue(session);
 924 #endif // 1
 925         return sd_bus_reply_method_return(message, NULL);
 926 }
 927
 928 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 929         Manager *m = userdata;
 930         Session *session;
 931         const char *name;
 932         int r;
 933
 934         assert(message);
 935         assert(m);
 936
 937         r = sd_bus_message_read(message, "s", &name);
 938         if (r < 0)
 939                 return r;
 940
 941         r = manager_get_session_from_creds(m, message, name, error, &session);
 942         if (r < 0)
 943                 return r;
 944
 945         return bus_session_method_activate(message, session, error);
 946 }
 947
 948 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 949         const char *session_name, *seat_name;
 950         Manager *m = userdata;
 951         Session *session;
 952         Seat *seat;
 953         int r;
 954
 955         assert(message);
 956         assert(m);
 957
 958         /* Same as ActivateSession() but refuses to work if
 959          * the seat doesn't match */
 960
 961         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 962         if (r < 0)
 963                 return r;
 964
 965         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 966         if (r < 0)
 967                 return r;
 968
 969         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 970         if (r < 0)
 971                 return r;
 972
 973         if (session->seat != seat)
 974                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
 975
 976         r = session_activate(session);
 977         if (r < 0)
 978                 return r;
 979
 980         return sd_bus_reply_method_return(message, NULL);
 981 }
 982
 983 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 984         Manager *m = userdata;
 985         Session *session;
 986         const char *name;
 987         int r;
 988
 989         assert(message);
 990         assert(m);
 991
 992         r = sd_bus_message_read(message, "s", &name);
 993         if (r < 0)
 994                 return r;
 995
 996         r = manager_get_session_from_creds(m, message, name, error, &session);
 997         if (r < 0)
 998                 return r;
 999
1000         return bus_session_method_lock(message, session, error);
1001 }
1002
1003 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1004         Manager *m = userdata;
1005         int r;
1006
1007         assert(message);
1008         assert(m);
1009
1010         r = bus_verify_polkit_async(
1011                         message,
1012                         CAP_SYS_ADMIN,
1013                         "org.freedesktop.login1.lock-sessions",
1014                         NULL,
1015                         false,
1016                         UID_INVALID,
1017                         &m->polkit_registry,
1018                         error);
1019         if (r < 0)
1020                 return r;
1021         if (r == 0)
1022                 return 1; /* Will call us back */
1023
1024         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1025         if (r < 0)
1026                 return r;
1027
1028         return sd_bus_reply_method_return(message, NULL);
1029 }
1030
1031 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1032         const char *name;
1033         Manager *m = userdata;
1034         Session *session;
1035         int r;
1036
1037         assert(message);
1038         assert(m);
1039
1040         r = sd_bus_message_read(message, "s", &name);
1041         if (r < 0)
1042                 return r;
1043
1044         r = manager_get_session_from_creds(m, message, name, error, &session);
1045         if (r < 0)
1046                 return r;
1047
1048         return bus_session_method_kill(message, session, error);
1049 }
1050
1051 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1052         Manager *m = userdata;
1053         uint32_t uid;
1054         User *user;
1055         int r;
1056
1057         assert(message);
1058         assert(m);
1059
1060         r = sd_bus_message_read(message, "u", &uid);
1061         if (r < 0)
1062                 return r;
1063
1064         r = manager_get_user_from_creds(m, message, uid, error, &user);
1065         if (r < 0)
1066                 return r;
1067
1068         return bus_user_method_kill(message, user, error);
1069 }
1070
1071 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1072         Manager *m = userdata;
1073         const char *name;
1074         Session *session;
1075         int r;
1076
1077         assert(message);
1078         assert(m);
1079
1080         r = sd_bus_message_read(message, "s", &name);
1081         if (r < 0)
1082                 return r;
1083
1084         r = manager_get_session_from_creds(m, message, name, error, &session);
1085         if (r < 0)
1086                 return r;
1087
1088         return bus_session_method_terminate(message, session, error);
1089 }
1090
1091 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1092         Manager *m = userdata;
1093         uint32_t uid;
1094         User *user;
1095         int r;
1096
1097         assert(message);
1098         assert(m);
1099
1100         r = sd_bus_message_read(message, "u", &uid);
1101         if (r < 0)
1102                 return r;
1103
1104         r = manager_get_user_from_creds(m, message, uid, error, &user);
1105         if (r < 0)
1106                 return r;
1107
1108         return bus_user_method_terminate(message, user, error);
1109 }
1110
1111 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1112         Manager *m = userdata;
1113         const char *name;
1114         Seat *seat;
1115         int r;
1116
1117         assert(message);
1118         assert(m);
1119
1120         r = sd_bus_message_read(message, "s", &name);
1121         if (r < 0)
1122                 return r;
1123
1124         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1125         if (r < 0)
1126                 return r;
1127
1128         return bus_seat_method_terminate(message, seat, error);
1129 }
1130
1131 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1132         _cleanup_free_ char *cc = NULL;
1133         Manager *m = userdata;
1134         int r, b, interactive;
1135         struct passwd *pw;
1136         const char *path;
1137         uint32_t uid;
1138         bool self = false;
1139
1140         assert(message);
1141         assert(m);
1142
1143         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1144         if (r < 0)
1145                 return r;
1146
1147         if (uid == UID_INVALID) {
1148                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1149
1150                 /* Note that we get the owner UID of the session, not the actual client UID here! */
1151                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1152                 if (r < 0)
1153                         return r;
1154
1155                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1156                 if (r < 0)
1157                         return r;
1158
1159                 self = true;
1160
1161         } else if (!uid_is_valid(uid))
1162                 return -EINVAL;
1163
1164         errno = 0;
1165         pw = getpwuid(uid);
1166         if (!pw)
1167                 return errno > 0 ? -errno : -ENOENT;
1168
1169         r = bus_verify_polkit_async(
1170                         message,
1171                         CAP_SYS_ADMIN,
1172                         self ? "org.freedesktop.login1.set-self-linger" : "org.freedesktop.login1.set-user-linger",
1173                         NULL,
1174                         interactive,
1175                         UID_INVALID,
1176                         &m->polkit_registry,
1177                         error);
1178         if (r < 0)
1179                 return r;
1180         if (r == 0)
1181                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1182
1183         mkdir_p_label("/var/lib/systemd", 0755);
1184
1185         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0);
1186         if (r < 0)
1187                 return r;
1188
1189         cc = cescape(pw->pw_name);
1190         if (!cc)
1191                 return -ENOMEM;
1192
1193         path = strjoina("/var/lib/systemd/linger/", cc);
1194         if (b) {
1195                 User *u;
1196
1197                 r = touch(path);
1198                 if (r < 0)
1199                         return r;
1200
1201                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1202                         user_start(u);
1203
1204         } else {
1205                 User *u;
1206
1207                 r = unlink(path);
1208                 if (r < 0 && errno != ENOENT)
1209                         return -errno;
1210
1211                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1212                 if (u)
1213                         user_add_to_gc_queue(u);
1214         }
1215
1216         return sd_bus_reply_method_return(message, NULL);
1217 }
1218
1219 static int trigger_device(Manager *m, struct udev_device *d) {
1220         _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
1221         struct udev_list_entry *first, *item;
1222         int r;
1223
1224         assert(m);
1225
1226         e = udev_enumerate_new(m->udev);
1227         if (!e)
1228                 return -ENOMEM;
1229
1230         if (d) {
1231                 r = udev_enumerate_add_match_parent(e, d);
1232                 if (r < 0)
1233                         return r;
1234         }
1235
1236         r = udev_enumerate_scan_devices(e);
1237         if (r < 0)
1238                 return r;
1239
1240         first = udev_enumerate_get_list_entry(e);
1241         udev_list_entry_foreach(item, first) {
1242                 _cleanup_free_ char *t = NULL;
1243                 const char *p;
1244
1245                 p = udev_list_entry_get_name(item);
1246
1247                 t = strappend(p, "/uevent");
1248                 if (!t)
1249                         return -ENOMEM;
1250
1251                 write_string_file(t, "change", WRITE_STRING_FILE_CREATE);
1252         }
1253
1254         return 0;
1255 }
1256
1257 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1258         _cleanup_udev_device_unref_ struct udev_device *d = NULL;
1259         _cleanup_free_ char *rule = NULL, *file = NULL;
1260         const char *id_for_seat;
1261         int r;
1262
1263         assert(m);
1264         assert(seat);
1265         assert(sysfs);
1266
1267         d = udev_device_new_from_syspath(m->udev, sysfs);
1268         if (!d)
1269                 return -ENODEV;
1270
1271         if (!udev_device_has_tag(d, "seat"))
1272                 return -ENODEV;
1273
1274         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1275         if (!id_for_seat)
1276                 return -ENODEV;
1277
1278         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1279                 return -ENOMEM;
1280
1281         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1282                 return -ENOMEM;
1283
1284         mkdir_p_label("/etc/udev/rules.d", 0755);
1285         r = write_string_file_atomic_label(file, rule);
1286         if (r < 0)
1287                 return r;
1288
1289         return trigger_device(m, d);
1290 }
1291
1292 static int flush_devices(Manager *m) {
1293         _cleanup_closedir_ DIR *d;
1294
1295         assert(m);
1296
1297         d = opendir("/etc/udev/rules.d");
1298         if (!d) {
1299                 if (errno != ENOENT)
1300                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1301         } else {
1302                 struct dirent *de;
1303
1304                 FOREACH_DIRENT_ALL(de, d, break) {
1305                         if (!dirent_is_file(de))
1306                                 continue;
1307
1308                         if (!startswith(de->d_name, "72-seat-"))
1309                                 continue;
1310
1311                         if (!endswith(de->d_name, ".rules"))
1312                                 continue;
1313
1314                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1315                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1316                 }
1317         }
1318
1319         return trigger_device(m, NULL);
1320 }
1321
1322 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1323         const char *sysfs, *seat;
1324         Manager *m = userdata;
1325         int interactive, r;
1326
1327         assert(message);
1328         assert(m);
1329
1330         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1331         if (r < 0)
1332                 return r;
1333
1334         if (!path_startswith(sysfs, "/sys"))
1335                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1336
1337         if (!seat_name_is_valid(seat))
1338                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1339
1340         r = bus_verify_polkit_async(
1341                         message,
1342                         CAP_SYS_ADMIN,
1343                         "org.freedesktop.login1.attach-device",
1344                         NULL,
1345                         interactive,
1346                         UID_INVALID,
1347                         &m->polkit_registry,
1348                         error);
1349         if (r < 0)
1350                 return r;
1351         if (r == 0)
1352                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1353
1354         r = attach_device(m, seat, sysfs);
1355         if (r < 0)
1356                 return r;
1357
1358         return sd_bus_reply_method_return(message, NULL);
1359 }
1360
1361 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1362         Manager *m = userdata;
1363         int interactive, r;
1364
1365         assert(message);
1366         assert(m);
1367
1368         r = sd_bus_message_read(message, "b", &interactive);
1369         if (r < 0)
1370                 return r;
1371
1372         r = bus_verify_polkit_async(
1373                         message,
1374                         CAP_SYS_ADMIN,
1375                         "org.freedesktop.login1.flush-devices",
1376                         NULL,
1377                         interactive,
1378                         UID_INVALID,
1379                         &m->polkit_registry,
1380                         error);
1381         if (r < 0)
1382                 return r;
1383         if (r == 0)
1384                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1385
1386         r = flush_devices(m);
1387         if (r < 0)
1388                 return r;
1389
1390         return sd_bus_reply_method_return(message, NULL);
1391 }
1392
1393 #if 0 /// elogind has its own variant in elogind-dbus.c
1394 static int have_multiple_sessions(
1395                 Manager *m,
1396                 uid_t uid) {
1397
1398         Session *session;
1399         Iterator i;
1400
1401         assert(m);
1402
1403         /* Check for other users' sessions. Greeter sessions do not
1404          * count, and non-login sessions do not count either. */
1405         HASHMAP_FOREACH(session, m->sessions, i)
1406                 if (session->class == SESSION_USER &&
1407                     session->user->uid != uid)
1408                         return true;
1409
1410         return false;
1411 }
1412
1413 static int bus_manager_log_shutdown(
1414                 Manager *m,
1415                 InhibitWhat w,
1416                 const char *unit_name) {
1417
1418         const char *p, *q;
1419
1420         assert(m);
1421         assert(unit_name);
1422
1423         if (w != INHIBIT_SHUTDOWN)
1424                 return 0;
1425
1426         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1427                 p = "MESSAGE=System is powering down";
1428                 q = "SHUTDOWN=power-off";
1429         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1430                 p = "MESSAGE=System is halting";
1431                 q = "SHUTDOWN=halt";
1432         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1433                 p = "MESSAGE=System is rebooting";
1434                 q = "SHUTDOWN=reboot";
1435         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1436                 p = "MESSAGE=System is rebooting with kexec";
1437                 q = "SHUTDOWN=kexec";
1438         } else {
1439                 p = "MESSAGE=System is shutting down";
1440                 q = NULL;
1441         }
1442
1443         if (isempty(m->wall_message))
1444                 p = strjoina(p, ".");
1445         else
1446                 p = strjoina(p, " (", m->wall_message, ").");
1447
1448         return log_struct(LOG_NOTICE,
1449                           LOG_MESSAGE_ID(SD_MESSAGE_SHUTDOWN),
1450                           p,
1451                           q,
1452                           NULL);
1453 }
1454 #endif // 0
1455
1456 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1457         Manager *m = userdata;
1458
1459         assert(e);
1460         assert(m);
1461
1462         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1463         return 0;
1464 }
1465
1466 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1467         int r;
1468
1469         assert(m);
1470
1471         if (until <= now(CLOCK_MONOTONIC))
1472                 return 0;
1473
1474         /* We want to ignore the lid switch for a while after each
1475          * suspend, and after boot-up. Hence let's install a timer for
1476          * this. As long as the event source exists we ignore the lid
1477          * switch. */
1478
1479         if (m->lid_switch_ignore_event_source) {
1480                 usec_t u;
1481
1482                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1483                 if (r < 0)
1484                         return r;
1485
1486                 if (until <= u)
1487                         return 0;
1488
1489                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1490         } else
1491                 r = sd_event_add_time(
1492                                 m->event,
1493                                 &m->lid_switch_ignore_event_source,
1494                                 CLOCK_MONOTONIC,
1495                                 until, 0,
1496                                 lid_switch_ignore_handler, m);
1497
1498         return r;
1499 }
1500
1501 static void reset_scheduled_shutdown(Manager *m) {
1502         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
1503         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
1504         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
1505         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
1506         m->scheduled_shutdown_timeout = 0;
1507         m->shutdown_dry_run = false;
1508
1509         if (m->unlink_nologin) {
1510                 (void) unlink("/run/nologin");
1511                 m->unlink_nologin = false;
1512         }
1513 }
1514
1515 #if 0 /// elogind has its own variant in elogind-dbus.c
1516 static int execute_shutdown_or_sleep(
1517                 Manager *m,
1518                 InhibitWhat w,
1519                 const char *unit_name,
1520                 sd_bus_error *error) {
1521
1522         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1523         char *c = NULL;
1524         const char *p;
1525         int r;
1526
1527         assert(m);
1528         assert(w >= 0);
1529         assert(w < _INHIBIT_WHAT_MAX);
1530         assert(unit_name);
1531
1532         bus_manager_log_shutdown(m, w, unit_name);
1533
1534         if (m->shutdown_dry_run) {
1535                 log_info("Running in dry run, suppressing action.");
1536                 reset_scheduled_shutdown(m);
1537         } else {
1538                 r = sd_bus_call_method(
1539                                 m->bus,
1540                                 "org.freedesktop.systemd1",
1541                                 "/org/freedesktop/systemd1",
1542                                 "org.freedesktop.systemd1.Manager",
1543                                 "StartUnit",
1544                                 error,
1545                                 &reply,
1546                                 "ss", unit_name, "replace-irreversibly");
1547                 if (r < 0)
1548                         return r;
1549
1550                 r = sd_bus_message_read(reply, "o", &p);
1551                 if (r < 0)
1552                         return r;
1553
1554                 c = strdup(p);
1555                 if (!c)
1556                         return -ENOMEM;
1557         }
1558
1559         m->action_unit = unit_name;
1560         free(m->action_job);
1561         m->action_job = c;
1562         m->action_what = w;
1563
1564         /* Make sure the lid switch is ignored for a while */
1565         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1566
1567         return 0;
1568 }
1569
1570 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1571
1572         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1573         Inhibitor *offending = NULL;
1574         int r;
1575
1576         assert(manager);
1577
1578         if (manager->action_what == 0 || manager->action_job)
1579                 return 0;
1580
1581         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1582                 _cleanup_free_ char *comm = NULL, *u = NULL;
1583
1584                 if (!timeout)
1585                         return 0;
1586
1587                 (void) get_process_comm(offending->pid, &comm);
1588                 u = uid_to_name(offending->uid);
1589
1590                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1591                            offending->uid, strna(u),
1592                            offending->pid, strna(comm));
1593         }
1594
1595         /* Actually do the operation */
1596         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1597         if (r < 0) {
1598                 log_warning("Failed to send delayed message: %s", bus_error_message(&error, r));
1599
1600                 manager->action_unit = NULL;
1601                 manager->action_what = 0;
1602                 return r;
1603         }
1604
1605         return 1;
1606 }
1607
1608 static int manager_inhibit_timeout_handler(
1609                         sd_event_source *s,
1610                         uint64_t usec,
1611                         void *userdata) {
1612
1613         Manager *manager = userdata;
1614         int r;
1615
1616         assert(manager);
1617         assert(manager->inhibit_timeout_source == s);
1618
1619         r = manager_dispatch_delayed(manager, true);
1620         return (r < 0) ? r : 0;
1621 }
1622
1623 static int delay_shutdown_or_sleep(
1624                 Manager *m,
1625                 InhibitWhat w,
1626                 const char *unit_name) {
1627
1628         int r;
1629         usec_t timeout_val;
1630
1631         assert(m);
1632         assert(w >= 0);
1633         assert(w < _INHIBIT_WHAT_MAX);
1634         assert(unit_name);
1635
1636         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1637
1638         if (m->inhibit_timeout_source) {
1639                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1640                 if (r < 0)
1641                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1642
1643                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1644                 if (r < 0)
1645                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1646         } else {
1647                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1648                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1649                 if (r < 0)
1650                         return r;
1651         }
1652
1653         m->action_unit = unit_name;
1654         m->action_what = w;
1655
1656         return 0;
1657 }
1658
1659 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1660
1661         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1662                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1663                 [INHIBIT_SLEEP] = "PrepareForSleep"
1664         };
1665
1666         int active = _active;
1667
1668         assert(m);
1669         assert(w >= 0);
1670         assert(w < _INHIBIT_WHAT_MAX);
1671         assert(signal_name[w]);
1672
1673         return sd_bus_emit_signal(m->bus,
1674                                   "/org/freedesktop/login1",
1675                                   "org.freedesktop.login1.Manager",
1676                                   signal_name[w],
1677                                   "b",
1678                                   active);
1679 }
1680
1681 int bus_manager_shutdown_or_sleep_now_or_later(
1682                 Manager *m,
1683                 const char *unit_name,
1684                 InhibitWhat w,
1685                 sd_bus_error *error) {
1686
1687         bool delayed;
1688         int r;
1689
1690         assert(m);
1691         assert(unit_name);
1692         assert(w >= 0);
1693         assert(w <= _INHIBIT_WHAT_MAX);
1694         assert(!m->action_job);
1695
1696         /* Tell everybody to prepare for shutdown/sleep */
1697         send_prepare_for(m, w, true);
1698
1699         delayed =
1700                 m->inhibit_delay_max > 0 &&
1701                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1702
1703         log_debug_elogind("%s called for %s (%sdelayed)", __FUNCTION__,
1704                           handle_action_to_string(action),
1705                           delayed ? "" : "NOT ");
1706         if (delayed)
1707                 /* Shutdown is delayed, keep in mind what we
1708                  * want to do, and start a timeout */
1709                 r = delay_shutdown_or_sleep(m, w, unit_name);
1710         else
1711                 /* Shutdown is not delayed, execute it
1712                  * immediately */
1713                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1714
1715         return r;
1716 }
1717
1718 static int verify_shutdown_creds(
1719                 Manager *m,
1720                 sd_bus_message *message,
1721                 InhibitWhat w,
1722                 bool interactive,
1723                 const char *action,
1724                 const char *action_multiple_sessions,
1725                 const char *action_ignore_inhibit,
1726                 sd_bus_error *error) {
1727
1728         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1729         bool multiple_sessions, blocked;
1730         uid_t uid;
1731         int r;
1732
1733         assert(m);
1734         assert(message);
1735         assert(w >= 0);
1736         assert(w <= _INHIBIT_WHAT_MAX);
1737
1738         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1739         if (r < 0)
1740                 return r;
1741
1742         r = sd_bus_creds_get_euid(creds, &uid);
1743         if (r < 0)
1744                 return r;
1745
1746         r = have_multiple_sessions(m, uid);
1747         if (r < 0)
1748                 return r;
1749
1750         multiple_sessions = r > 0;
1751         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1752
1753         if (multiple_sessions && action_multiple_sessions) {
1754                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1755                 if (r < 0)
1756                         return r;
1757                 if (r == 0)
1758                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1759         }
1760
1761         if (blocked && action_ignore_inhibit) {
1762                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1763                 if (r < 0)
1764                         return r;
1765                 if (r == 0)
1766                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1767         }
1768
1769         if (!multiple_sessions && !blocked && action) {
1770                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1771                 if (r < 0)
1772                         return r;
1773                 if (r == 0)
1774                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1775         }
1776
1777         return 0;
1778 }
1779
1780 static int method_do_shutdown_or_sleep(
1781                 Manager *m,
1782                 sd_bus_message *message,
1783                 const char *unit_name,
1784                 InhibitWhat w,
1785                 const char *action,
1786                 const char *action_multiple_sessions,
1787                 const char *action_ignore_inhibit,
1788                 const char *sleep_verb,
1789                 sd_bus_error *error) {
1790
1791         int interactive, r;
1792
1793         assert(m);
1794         assert(message);
1795         assert(unit_name);
1796         assert(w >= 0);
1797         assert(w <= _INHIBIT_WHAT_MAX);
1798
1799         r = sd_bus_message_read(message, "b", &interactive);
1800         if (r < 0)
1801                 return r;
1802
1803         log_debug_elogind("%s called with action '%s', sleep '%s' (%sinteractive)",
1804                           __FUNCTION__, action, sleep_verb,
1805                           interactive ? "" : "NOT ");
1806         /* Don't allow multiple jobs being executed at the same time */
1807         if (m->action_what)
1808                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1809
1810         if (sleep_verb) {
1811                 r = can_sleep(sleep_verb);
1812                 if (r < 0)
1813                         return r;
1814
1815                 if (r == 0)
1816                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb not supported");
1817         }
1818
1819         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1820                                   action_ignore_inhibit, error);
1821         log_debug_elogind("verify_shutdown_creds() returned %d", r);
1822         if (r != 0)
1823                 return r;
1824
1825         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1826         if (r < 0)
1827                 return r;
1828
1829         return sd_bus_reply_method_return(message, NULL);
1830 }
1831
1832 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1833         Manager *m = userdata;
1834
1835         log_debug_elogind("%s called", __FUNCTION__);
1836         return method_do_shutdown_or_sleep(
1837                         m, message,
1838                         SPECIAL_POWEROFF_TARGET,
1839                         INHIBIT_SHUTDOWN,
1840                         "org.freedesktop.login1.power-off",
1841                         "org.freedesktop.login1.power-off-multiple-sessions",
1842                         "org.freedesktop.login1.power-off-ignore-inhibit",
1843                         NULL,
1844                         error);
1845 }
1846
1847 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1848         Manager *m = userdata;
1849
1850         log_debug_elogind("%s called", __FUNCTION__);
1851         return method_do_shutdown_or_sleep(
1852                         m, message,
1853                         SPECIAL_REBOOT_TARGET,
1854                         INHIBIT_SHUTDOWN,
1855                         "org.freedesktop.login1.reboot",
1856                         "org.freedesktop.login1.reboot-multiple-sessions",
1857                         "org.freedesktop.login1.reboot-ignore-inhibit",
1858                         NULL,
1859                         error);
1860 }
1861
1862 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1863         Manager *m = userdata;
1864
1865         log_debug_elogind("%s called", __FUNCTION__);
1866         return method_do_shutdown_or_sleep(
1867                         m, message,
1868                         SPECIAL_SUSPEND_TARGET,
1869                         INHIBIT_SLEEP,
1870                         "org.freedesktop.login1.suspend",
1871                         "org.freedesktop.login1.suspend-multiple-sessions",
1872                         "org.freedesktop.login1.suspend-ignore-inhibit",
1873                         "suspend",
1874                         error);
1875 }
1876 #endif // 0
1877
1878 static int nologin_timeout_handler(
1879                         sd_event_source *s,
1880                         uint64_t usec,
1881                         void *userdata) {
1882
1883         Manager *m = userdata;
1884         int r;
1885
1886         log_info("Creating /run/nologin, blocking further logins...");
1887
1888         r = write_string_file_atomic_label("/run/nologin", "System is going down.");
1889         if (r < 0)
1890                 log_error_errno(r, "Failed to create /run/nologin: %m");
1891         else
1892                 m->unlink_nologin = true;
1893
1894         return 0;
1895 }
1896
1897 static int update_schedule_file(Manager *m) {
1898         _cleanup_free_ char *temp_path = NULL;
1899         _cleanup_fclose_ FILE *f = NULL;
1900         int r;
1901
1902         assert(m);
1903
1904         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0);
1905         if (r < 0)
1906                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1907
1908         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1909         if (r < 0)
1910                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1911
1912         (void) fchmod(fileno(f), 0644);
1913
1914         fprintf(f,
1915                 "USEC="USEC_FMT"\n"
1916                 "WARN_WALL=%i\n"
1917                 "MODE=%s\n",
1918                 m->scheduled_shutdown_timeout,
1919                 m->enable_wall_messages,
1920                 m->scheduled_shutdown_type);
1921
1922         if (!isempty(m->wall_message)) {
1923                 _cleanup_free_ char *t;
1924
1925                 t = cescape(m->wall_message);
1926                 if (!t) {
1927                         r = -ENOMEM;
1928                         goto fail;
1929                 }
1930
1931                 fprintf(f, "WALL_MESSAGE=%s\n", t);
1932         }
1933
1934         r = fflush_and_check(f);
1935         if (r < 0)
1936                 goto fail;
1937
1938         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
1939                 r = -errno;
1940                 goto fail;
1941         }
1942
1943         return 0;
1944
1945 fail:
1946         (void) unlink(temp_path);
1947         (void) unlink("/run/systemd/shutdown/scheduled");
1948
1949         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
1950 }
1951
1952 #if 0 /// elogind has its own variant in elogind-dbus.c
1953 static int manager_scheduled_shutdown_handler(
1954                         sd_event_source *s,
1955                         uint64_t usec,
1956                         void *userdata) {
1957
1958         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1959         Manager *m = userdata;
1960         const char *target;
1961         int r;
1962
1963         assert(m);
1964
1965         if (isempty(m->scheduled_shutdown_type))
1966                 return 0;
1967
1968         if (streq(m->scheduled_shutdown_type, "halt"))
1969                 target = SPECIAL_HALT_TARGET;
1970         else if (streq(m->scheduled_shutdown_type, "poweroff"))
1971                 target = SPECIAL_POWEROFF_TARGET;
1972         else
1973                 target = SPECIAL_REBOOT_TARGET;
1974
1975         r = execute_shutdown_or_sleep(m, 0, target, &error);
1976         if (r < 0)
1977                 return log_error_errno(r, "Unable to execute transition to %s: %m", target);
1978
1979         return 0;
1980 }
1981 #endif // 0
1982
1983 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1984         Manager *m = userdata;
1985         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1986         const char *action_multiple_sessions = NULL;
1987         const char *action_ignore_inhibit = NULL;
1988         const char *action = NULL;
1989         uint64_t elapse;
1990         char *type;
1991         int r;
1992
1993         assert(m);
1994         assert(message);
1995
1996         log_debug_elogind("%s called", __FUNCTION__);
1997         r = sd_bus_message_read(message, "st", &type, &elapse);
1998         if (r < 0)
1999                 return r;
2000
2001         if (startswith(type, "dry-")) {
2002                 type += 4;
2003                 m->shutdown_dry_run = true;
2004         }
2005
2006         if (streq(type, "reboot")) {
2007                 action = "org.freedesktop.login1.reboot";
2008                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2009                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2010         } else if (streq(type, "halt")) {
2011                 action = "org.freedesktop.login1.halt";
2012                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2013                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2014         } else if (streq(type, "poweroff")) {
2015                 action = "org.freedesktop.login1.power-off";
2016                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2017                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2018         } else
2019                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2020
2021         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2022                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2023         if (r != 0)
2024                 return r;
2025
2026         if (m->scheduled_shutdown_timeout_source) {
2027                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2028                 if (r < 0)
2029                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2030
2031                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2032                 if (r < 0)
2033                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2034         } else {
2035                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2036                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2037                 if (r < 0)
2038                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2039         }
2040
2041         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2042         if (r < 0) {
2043                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2044                 return log_oom();
2045         }
2046
2047         if (m->nologin_timeout_source) {
2048                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2049                 if (r < 0)
2050                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2051
2052                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2053                 if (r < 0)
2054                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2055         } else {
2056                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2057                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2058                 if (r < 0)
2059                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2060         }
2061
2062         m->scheduled_shutdown_timeout = elapse;
2063
2064         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2065         if (r >= 0) {
2066                 const char *tty = NULL;
2067
2068                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2069                 (void) sd_bus_creds_get_tty(creds, &tty);
2070
2071                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2072                 if (r < 0) {
2073                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2074                         return log_oom();
2075                 }
2076         }
2077
2078         r = manager_setup_wall_message_timer(m);
2079         if (r < 0)
2080                 return r;
2081
2082         if (!isempty(type)) {
2083                 r = update_schedule_file(m);
2084                 if (r < 0)
2085                         return r;
2086         } else
2087                 (void) unlink("/run/systemd/shutdown/scheduled");
2088
2089         return sd_bus_reply_method_return(message, NULL);
2090 }
2091
2092 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2093         Manager *m = userdata;
2094         bool cancelled;
2095 #if 1 /// elogind needs to construct the message to allow extra wall messages
2096         _cleanup_free_ char *l = NULL;
2097 #endif // 1
2098
2099         assert(m);
2100         assert(message);
2101
2102         log_debug_elogind("%s called", __FUNCTION__);
2103         cancelled = m->scheduled_shutdown_type != NULL;
2104         reset_scheduled_shutdown(m);
2105
2106         if (cancelled) {
2107                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2108                 const char *tty = NULL;
2109                 uid_t uid = 0;
2110                 int r;
2111
2112                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2113                 if (r >= 0) {
2114                         (void) sd_bus_creds_get_uid(creds, &uid);
2115                         (void) sd_bus_creds_get_tty(creds, &tty);
2116                 }
2117
2118 #if 0 /// elogind wants to allow extra cancellation messages
2119                 utmp_wall("The system shutdown has been cancelled",
2120                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2121 #else
2122                 r = asprintf(&l, "%s%sThe system shutdown has been cancelled!",
2123                              strempty(m->wall_message),
2124                              isempty(m->wall_message) ? "" : "\n");
2125                 if (r < 0) {
2126                         log_oom();
2127                         return 0;
2128                 }
2129
2130                 utmp_wall(l, uid_to_name(uid), tty, logind_wall_tty_filter, m);
2131 #endif // 0
2132         }
2133
2134         return sd_bus_reply_method_return(message, "b", cancelled);
2135 }
2136
2137 #if 0 /// elogind has its own variant in elogind-dbus.c
2138 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2139         Manager *m = userdata;
2140
2141         log_debug_elogind("%s called", __FUNCTION__);
2142         return method_do_shutdown_or_sleep(
2143                         m, message,
2144                         SPECIAL_HIBERNATE_TARGET,
2145                         INHIBIT_SLEEP,
2146                         "org.freedesktop.login1.hibernate",
2147                         "org.freedesktop.login1.hibernate-multiple-sessions",
2148                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2149                         "hibernate",
2150                         error);
2151 }
2152
2153 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2154         Manager *m = userdata;
2155
2156         log_debug_elogind("%s called", __FUNCTION__);
2157         return method_do_shutdown_or_sleep(
2158                         m, message,
2159                         SPECIAL_HYBRID_SLEEP_TARGET,
2160                         INHIBIT_SLEEP,
2161                         "org.freedesktop.login1.hibernate",
2162                         "org.freedesktop.login1.hibernate-multiple-sessions",
2163                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2164                         "hybrid-sleep",
2165                         error);
2166 }
2167 #endif // 0
2168
2169 static int method_can_shutdown_or_sleep(
2170                 Manager *m,
2171                 sd_bus_message *message,
2172                 InhibitWhat w,
2173                 const char *action,
2174                 const char *action_multiple_sessions,
2175                 const char *action_ignore_inhibit,
2176                 const char *sleep_verb,
2177                 sd_bus_error *error) {
2178
2179         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2180         bool multiple_sessions, challenge, blocked;
2181         const char *result = NULL;
2182         uid_t uid;
2183         int r;
2184
2185         assert(m);
2186         assert(message);
2187         assert(w >= 0);
2188         assert(w <= _INHIBIT_WHAT_MAX);
2189         assert(action);
2190         assert(action_multiple_sessions);
2191         assert(action_ignore_inhibit);
2192
2193         if (sleep_verb) {
2194 #if 0 /// elogind needs to have the manager being passed
2195                 r = can_sleep(sleep_verb);
2196 #else
2197                 r = can_sleep(m, sleep_verb);
2198 #endif // 0
2199                 if (r < 0)
2200                         return r;
2201                 if (r == 0)
2202                         return sd_bus_reply_method_return(message, "s", "na");
2203         }
2204
2205         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2206         if (r < 0)
2207                 return r;
2208
2209         r = sd_bus_creds_get_euid(creds, &uid);
2210         if (r < 0)
2211                 return r;
2212
2213         r = have_multiple_sessions(m, uid);
2214         if (r < 0)
2215                 return r;
2216
2217         multiple_sessions = r > 0;
2218         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2219
2220         if (multiple_sessions) {
2221                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2222                 if (r < 0)
2223                         return r;
2224
2225                 if (r > 0)
2226                         result = "yes";
2227                 else if (challenge)
2228                         result = "challenge";
2229                 else
2230                         result = "no";
2231         }
2232
2233         if (blocked) {
2234                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2235                 if (r < 0)
2236                         return r;
2237
2238                 if (r > 0 && !result)
2239                         result = "yes";
2240                 else if (challenge && (!result || streq(result, "yes")))
2241                         result = "challenge";
2242                 else
2243                         result = "no";
2244         }
2245
2246         if (!multiple_sessions && !blocked) {
2247                 /* If neither inhibit nor multiple sessions
2248                  * apply then just check the normal policy */
2249
2250                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2251                 if (r < 0)
2252                         return r;
2253
2254                 if (r > 0)
2255                         result = "yes";
2256                 else if (challenge)
2257                         result = "challenge";
2258                 else
2259                         result = "no";
2260         }
2261
2262         return sd_bus_reply_method_return(message, "s", result);
2263 }
2264
2265 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2266         Manager *m = userdata;
2267
2268         return method_can_shutdown_or_sleep(
2269                         m, message,
2270                         INHIBIT_SHUTDOWN,
2271                         "org.freedesktop.login1.power-off",
2272                         "org.freedesktop.login1.power-off-multiple-sessions",
2273                         "org.freedesktop.login1.power-off-ignore-inhibit",
2274                         NULL,
2275                         error);
2276 }
2277
2278 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2279         Manager *m = userdata;
2280
2281         return method_can_shutdown_or_sleep(
2282                         m, message,
2283                         INHIBIT_SHUTDOWN,
2284                         "org.freedesktop.login1.reboot",
2285                         "org.freedesktop.login1.reboot-multiple-sessions",
2286                         "org.freedesktop.login1.reboot-ignore-inhibit",
2287                         NULL,
2288                         error);
2289 }
2290
2291 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2292         Manager *m = userdata;
2293
2294         return method_can_shutdown_or_sleep(
2295                         m, message,
2296                         INHIBIT_SLEEP,
2297                         "org.freedesktop.login1.suspend",
2298                         "org.freedesktop.login1.suspend-multiple-sessions",
2299                         "org.freedesktop.login1.suspend-ignore-inhibit",
2300                         "suspend",
2301                         error);
2302 }
2303
2304 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2305         Manager *m = userdata;
2306
2307         return method_can_shutdown_or_sleep(
2308                         m, message,
2309                         INHIBIT_SLEEP,
2310                         "org.freedesktop.login1.hibernate",
2311                         "org.freedesktop.login1.hibernate-multiple-sessions",
2312                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2313                         "hibernate",
2314                         error);
2315 }
2316
2317 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2318         Manager *m = userdata;
2319
2320         return method_can_shutdown_or_sleep(
2321                         m, message,
2322                         INHIBIT_SLEEP,
2323                         "org.freedesktop.login1.hibernate",
2324                         "org.freedesktop.login1.hibernate-multiple-sessions",
2325                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2326                         "hybrid-sleep",
2327                         error);
2328 }
2329
2330 static int property_get_reboot_to_firmware_setup(
2331                 sd_bus *bus,
2332                 const char *path,
2333                 const char *interface,
2334                 const char *property,
2335                 sd_bus_message *reply,
2336                 void *userdata,
2337                 sd_bus_error *error) {
2338 #if 0 /// elogind does not support EFI
2339         int r;
2340
2341         assert(bus);
2342         assert(reply);
2343         assert(userdata);
2344
2345         r = efi_get_reboot_to_firmware();
2346         if (r < 0 && r != -EOPNOTSUPP)
2347                 return r;
2348
2349         return sd_bus_message_append(reply, "b", r > 0);
2350 #else
2351         return sd_bus_message_append(reply, "b", false);
2352 #endif // 0
2353 }
2354
2355 static int method_set_reboot_to_firmware_setup(
2356                 sd_bus_message *message,
2357                 void *userdata,
2358                 sd_bus_error *error) {
2359
2360         int b, r;
2361         Manager *m = userdata;
2362
2363         assert(message);
2364         assert(m);
2365
2366         r = sd_bus_message_read(message, "b", &b);
2367         if (r < 0)
2368                 return r;
2369
2370         r = bus_verify_polkit_async(message,
2371                                     CAP_SYS_ADMIN,
2372                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2373                                     NULL,
2374                                     false,
2375                                     UID_INVALID,
2376                                     &m->polkit_registry,
2377                                     error);
2378         if (r < 0)
2379                 return r;
2380         if (r == 0)
2381                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2382
2383 #if 0 /// elogind does not support EFI
2384         r = efi_set_reboot_to_firmware(b);
2385         if (r < 0)
2386                 return r;
2387 #endif // 0
2388
2389         return sd_bus_reply_method_return(message, NULL);
2390 }
2391
2392 static int method_can_reboot_to_firmware_setup(
2393                 sd_bus_message *message,
2394                 void *userdata,
2395                 sd_bus_error *error) {
2396
2397 #if 0 /// elogind does not support EFI
2398         int r;
2399         bool challenge;
2400         const char *result;
2401         Manager *m = userdata;
2402
2403         assert(message);
2404         assert(m);
2405
2406         r = efi_reboot_to_firmware_supported();
2407         if (r == -EOPNOTSUPP)
2408                 return sd_bus_reply_method_return(message, "s", "na");
2409         else if (r < 0)
2410                 return r;
2411
2412         r = bus_test_polkit(message,
2413                             CAP_SYS_ADMIN,
2414                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2415                             NULL,
2416                             UID_INVALID,
2417                             &challenge,
2418                             error);
2419         if (r < 0)
2420                 return r;
2421
2422         if (r > 0)
2423                 result = "yes";
2424         else if (challenge)
2425                 result = "challenge";
2426         else
2427                 result = "no";
2428
2429         return sd_bus_reply_method_return(message, "s", result);
2430 #else
2431         return sd_bus_reply_method_return(message, "s", "no");
2432 #endif // 0
2433 }
2434
2435 static int method_set_wall_message(
2436                 sd_bus_message *message,
2437                 void *userdata,
2438                 sd_bus_error *error) {
2439
2440         int r;
2441         Manager *m = userdata;
2442         char *wall_message;
2443         int enable_wall_messages;
2444
2445         assert(message);
2446         assert(m);
2447
2448         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2449         if (r < 0)
2450                 return r;
2451
2452 #if 0 /// elogind only calls this for shutdown/reboot, which already needs authorization.
2453         r = bus_verify_polkit_async(message,
2454                                     CAP_SYS_ADMIN,
2455                                     "org.freedesktop.login1.set-wall-message",
2456                                     NULL,
2457                                     false,
2458                                     UID_INVALID,
2459                                     &m->polkit_registry,
2460                                     error);
2461         if (r < 0)
2462                 return r;
2463         if (r == 0)
2464                 return 1; /* Will call us back */
2465 #endif // 0
2466
2467         if (isempty(wall_message))
2468                 m->wall_message = mfree(m->wall_message);
2469         else {
2470                 r = free_and_strdup(&m->wall_message, wall_message);
2471                 if (r < 0)
2472                         return log_oom();
2473         }
2474
2475         m->enable_wall_messages = enable_wall_messages;
2476
2477         return sd_bus_reply_method_return(message, NULL);
2478 }
2479
2480 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2481         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2482         const char *who, *why, *what, *mode;
2483         _cleanup_free_ char *id = NULL;
2484         _cleanup_close_ int fifo_fd = -1;
2485         Manager *m = userdata;
2486         Inhibitor *i = NULL;
2487         InhibitMode mm;
2488         InhibitWhat w;
2489         pid_t pid;
2490         uid_t uid;
2491         int r;
2492
2493         assert(message);
2494         assert(m);
2495
2496         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2497         if (r < 0)
2498                 return r;
2499
2500         w = inhibit_what_from_string(what);
2501         if (w <= 0)
2502                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2503
2504         mm = inhibit_mode_from_string(mode);
2505         if (mm < 0)
2506                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2507
2508         /* Delay is only supported for shutdown/sleep */
2509         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2510                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2511
2512         /* Don't allow taking delay locks while we are already
2513          * executing the operation. We shouldn't create the impression
2514          * that the lock was successful if the machine is about to go
2515          * down/suspend any moment. */
2516         if (m->action_what & w)
2517                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2518
2519         r = bus_verify_polkit_async(
2520                         message,
2521                         CAP_SYS_BOOT,
2522                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2523                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2524                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2525                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2526                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2527                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2528                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2529                         NULL,
2530                         false,
2531                         UID_INVALID,
2532                         &m->polkit_registry,
2533                         error);
2534         if (r < 0)
2535                 return r;
2536         if (r == 0)
2537                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2538
2539         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2540         if (r < 0)
2541                 return r;
2542
2543         r = sd_bus_creds_get_euid(creds, &uid);
2544         if (r < 0)
2545                 return r;
2546
2547         r = sd_bus_creds_get_pid(creds, &pid);
2548         if (r < 0)
2549                 return r;
2550
2551         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2552                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2553
2554         do {
2555                 id = mfree(id);
2556
2557                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2558                         return -ENOMEM;
2559
2560         } while (hashmap_get(m->inhibitors, id));
2561
2562         r = manager_add_inhibitor(m, id, &i);
2563         if (r < 0)
2564                 return r;
2565
2566         i->what = w;
2567         i->mode = mm;
2568         i->pid = pid;
2569         i->uid = uid;
2570         i->why = strdup(why);
2571         i->who = strdup(who);
2572
2573         if (!i->why || !i->who) {
2574                 r = -ENOMEM;
2575                 goto fail;
2576         }
2577
2578         fifo_fd = inhibitor_create_fifo(i);
2579         if (fifo_fd < 0) {
2580                 r = fifo_fd;
2581                 goto fail;
2582         }
2583
2584         inhibitor_start(i);
2585
2586         return sd_bus_reply_method_return(message, "h", fifo_fd);
2587
2588 fail:
2589         if (i)
2590                 inhibitor_free(i);
2591
2592         return r;
2593 }
2594
2595 const sd_bus_vtable manager_vtable[] = {
2596         SD_BUS_VTABLE_START(0),
2597
2598         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2599         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2600
2601 #if 0 /// UNNEEDED by elogind
2602         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2603 #endif // 0
2604         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2605         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2606         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2607         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2608         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2609         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2610         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2611         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2612         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2613         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2614         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2615         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2616         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2617         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2618         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2619         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2620         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2621         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2622         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2623         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2624         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2625         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2626         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2627         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2628         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2629         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0),
2630         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2631         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0),
2632         SD_BUS_PROPERTY("UserTasksMax", "t", NULL, offsetof(Manager, user_tasks_max), SD_BUS_VTABLE_PROPERTY_CONST),
2633
2634         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2635         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2636         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2637         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2638         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2639         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2640         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2641         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2642         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2643         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2644         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2645         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2646         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2647         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2648         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2649         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2650         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2651         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2652         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2653         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2654         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2655         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2656         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2657         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2658         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2659         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2660         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2661         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2662         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2663         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2664         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2665         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2666         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2667         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2668         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2669         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2670         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2671         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2672         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2673         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2674         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2675
2676         SD_BUS_SIGNAL("SessionNew", "so", 0),
2677         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2678         SD_BUS_SIGNAL("UserNew", "uo", 0),
2679         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2680         SD_BUS_SIGNAL("SeatNew", "so", 0),
2681         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2682         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2683         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2684
2685         SD_BUS_VTABLE_END
2686 };
2687
2688 #if 0 /// UNNEEDED by elogind
2689 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2690         int r = 0;
2691
2692         assert(s);
2693         assert(unit);
2694
2695         if (!s->started)
2696                 return r;
2697
2698         if (streq(result, "done"))
2699                 r = session_send_create_reply(s, NULL);
2700         else {
2701                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2702
2703                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2704                 r = session_send_create_reply(s, &e);
2705         }
2706
2707         return r;
2708 }
2709
2710 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2711         const char *path, *result, *unit;
2712         Manager *m = userdata;
2713         Session *session;
2714         uint32_t id;
2715         User *user;
2716         int r;
2717
2718         assert(message);
2719         assert(m);
2720
2721         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2722         if (r < 0) {
2723                 bus_log_parse_error(r);
2724                 return 0;
2725         }
2726
2727         if (m->action_job && streq(m->action_job, path)) {
2728                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2729
2730                 /* Tell people that they now may take a lock again */
2731                 send_prepare_for(m, m->action_what, false);
2732
2733                 m->action_job = mfree(m->action_job);
2734                 m->action_unit = NULL;
2735                 m->action_what = 0;
2736                 return 0;
2737         }
2738
2739         session = hashmap_get(m->session_units, unit);
2740         if (session && streq_ptr(path, session->scope_job)) {
2741                 session->scope_job = mfree(session->scope_job);
2742                 session_jobs_reply(session, unit, result);
2743
2744                 session_save(session);
2745                 user_save(session->user);
2746                 session_add_to_gc_queue(session);
2747         }
2748
2749         user = hashmap_get(m->user_units, unit);
2750         if (user &&
2751             (streq_ptr(path, user->service_job) ||
2752              streq_ptr(path, user->slice_job))) {
2753
2754                 if (streq_ptr(path, user->service_job))
2755                         user->service_job = mfree(user->service_job);
2756
2757                 if (streq_ptr(path, user->slice_job))
2758                         user->slice_job = mfree(user->slice_job);
2759
2760                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2761                         session_jobs_reply(session, unit, result);
2762
2763                 user_save(user);
2764                 user_add_to_gc_queue(user);
2765         }
2766
2767         return 0;
2768 }
2769
2770 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2771         const char *path, *unit;
2772         Manager *m = userdata;
2773         Session *session;
2774         User *user;
2775         int r;
2776
2777         assert(message);
2778         assert(m);
2779
2780         r = sd_bus_message_read(message, "so", &unit, &path);
2781         if (r < 0) {
2782                 bus_log_parse_error(r);
2783                 return 0;
2784         }
2785
2786         session = hashmap_get(m->session_units, unit);
2787         if (session)
2788                 session_add_to_gc_queue(session);
2789
2790         user = hashmap_get(m->user_units, unit);
2791         if (user)
2792                 user_add_to_gc_queue(user);
2793
2794         return 0;
2795 }
2796
2797 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2798         _cleanup_free_ char *unit = NULL;
2799         Manager *m = userdata;
2800         const char *path;
2801         Session *session;
2802         User *user;
2803         int r;
2804
2805         assert(message);
2806         assert(m);
2807
2808         path = sd_bus_message_get_path(message);
2809         if (!path)
2810                 return 0;
2811
2812         r = unit_name_from_dbus_path(path, &unit);
2813         if (r == -EINVAL) /* not a unit */
2814                 return 0;
2815         if (r < 0) {
2816                 log_oom();
2817                 return 0;
2818         }
2819
2820         session = hashmap_get(m->session_units, unit);
2821         if (session)
2822                 session_add_to_gc_queue(session);
2823
2824         user = hashmap_get(m->user_units, unit);
2825         if (user)
2826                 user_add_to_gc_queue(user);
2827
2828         return 0;
2829 }
2830
2831 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2832         Manager *m = userdata;
2833         Session *session;
2834         Iterator i;
2835         int b, r;
2836
2837         assert(message);
2838         assert(m);
2839
2840         r = sd_bus_message_read(message, "b", &b);
2841         if (r < 0) {
2842                 bus_log_parse_error(r);
2843                 return 0;
2844         }
2845
2846         if (b)
2847                 return 0;
2848
2849         /* systemd finished reloading, let's recheck all our sessions */
2850         log_debug("System manager has been reloaded, rechecking sessions...");
2851
2852         HASHMAP_FOREACH(session, m->sessions, i)
2853                 session_add_to_gc_queue(session);
2854
2855         return 0;
2856 }
2857 #endif // 0
2858
2859 int manager_send_changed(Manager *manager, const char *property, ...) {
2860         char **l;
2861
2862         assert(manager);
2863
2864         l = strv_from_stdarg_alloca(property);
2865
2866         return sd_bus_emit_properties_changed_strv(
2867                         manager->bus,
2868                         "/org/freedesktop/login1",
2869                         "org.freedesktop.login1.Manager",
2870                         l);
2871 }
2872
2873 #if 0 /// UNNEEDED by elogind
2874 static int strdup_job(sd_bus_message *reply, char **job) {
2875         const char *j;
2876         char *copy;
2877         int r;
2878
2879         r = sd_bus_message_read(reply, "o", &j);
2880         if (r < 0)
2881                 return r;
2882
2883         copy = strdup(j);
2884         if (!copy)
2885                 return -ENOMEM;
2886
2887         *job = copy;
2888         return 1;
2889 }
2890
2891 int manager_start_slice(
2892                 Manager *manager,
2893                 const char *slice,
2894                 const char *description,
2895                 const char *after,
2896                 const char *after2,
2897                 uint64_t tasks_max,
2898                 sd_bus_error *error,
2899                 char **job) {
2900
2901         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2902         int r;
2903
2904         assert(manager);
2905         assert(slice);
2906         assert(job);
2907
2908         r = sd_bus_message_new_method_call(
2909                         manager->bus,
2910                         &m,
2911                         "org.freedesktop.systemd1",
2912                         "/org/freedesktop/systemd1",
2913                         "org.freedesktop.systemd1.Manager",
2914                         "StartTransientUnit");
2915         if (r < 0)
2916                 return r;
2917
2918         r = sd_bus_message_append(m, "ss", strempty(slice), "fail");
2919         if (r < 0)
2920                 return r;
2921
2922         r = sd_bus_message_open_container(m, 'a', "(sv)");
2923         if (r < 0)
2924                 return r;
2925
2926         if (!isempty(description)) {
2927                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2928                 if (r < 0)
2929                         return r;
2930         }
2931
2932         if (!isempty(after)) {
2933                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
2934                 if (r < 0)
2935                         return r;
2936         }
2937
2938         if (!isempty(after2)) {
2939                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
2940                 if (r < 0)
2941                         return r;
2942         }
2943
2944         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
2945         if (r < 0)
2946                 return r;
2947
2948         r = sd_bus_message_close_container(m);
2949         if (r < 0)
2950                 return r;
2951
2952         r = sd_bus_message_append(m, "a(sa(sv))", 0);
2953         if (r < 0)
2954                 return r;
2955
2956         r = sd_bus_call(manager->bus, m, 0, error, &reply);
2957         if (r < 0)
2958                 return r;
2959
2960         return strdup_job(reply, job);
2961 }
2962
2963 int manager_start_scope(
2964                 Manager *manager,
2965                 const char *scope,
2966                 pid_t pid,
2967                 const char *slice,
2968                 const char *description,
2969                 const char *after,
2970                 const char *after2,
2971                 uint64_t tasks_max,
2972                 sd_bus_error *error,
2973                 char **job) {
2974
2975         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2976         int r;
2977
2978         assert(manager);
2979         assert(scope);
2980         assert(pid > 1);
2981         assert(job);
2982
2983         r = sd_bus_message_new_method_call(
2984                         manager->bus,
2985                         &m,
2986                         "org.freedesktop.systemd1",
2987                         "/org/freedesktop/systemd1",
2988                         "org.freedesktop.systemd1.Manager",
2989                         "StartTransientUnit");
2990         if (r < 0)
2991                 return r;
2992
2993         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
2994         if (r < 0)
2995                 return r;
2996
2997         r = sd_bus_message_open_container(m, 'a', "(sv)");
2998         if (r < 0)
2999                 return r;
3000
3001         if (!isempty(slice)) {
3002                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3003                 if (r < 0)
3004                         return r;
3005         }
3006
3007         if (!isempty(description)) {
3008                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3009                 if (r < 0)
3010                         return r;
3011         }
3012
3013         if (!isempty(after)) {
3014                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3015                 if (r < 0)
3016                         return r;
3017         }
3018
3019         if (!isempty(after2)) {
3020                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3021                 if (r < 0)
3022                         return r;
3023         }
3024
3025         /* cgroup empty notification is not available in containers
3026          * currently. To make this less problematic, let's shorten the
3027          * stop timeout for sessions, so that we don't wait
3028          * forever. */
3029
3030         /* Make sure that the session shells are terminated with
3031          * SIGHUP since bash and friends tend to ignore SIGTERM */
3032         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3033         if (r < 0)
3034                 return r;
3035
3036         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3037         if (r < 0)
3038                 return r;
3039
3040         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3041         if (r < 0)
3042                 return r;
3043
3044         r = sd_bus_message_close_container(m);
3045         if (r < 0)
3046                 return r;
3047
3048         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3049         if (r < 0)
3050                 return r;
3051
3052         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3053         if (r < 0)
3054                 return r;
3055
3056         return strdup_job(reply, job);
3057 }
3058
3059 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3060         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3061         int r;
3062
3063         assert(manager);
3064         assert(unit);
3065         assert(job);
3066
3067         r = sd_bus_call_method(
3068                         manager->bus,
3069                         "org.freedesktop.systemd1",
3070                         "/org/freedesktop/systemd1",
3071                         "org.freedesktop.systemd1.Manager",
3072                         "StartUnit",
3073                         error,
3074                         &reply,
3075                         "ss", unit, "replace");
3076         if (r < 0)
3077                 return r;
3078
3079         return strdup_job(reply, job);
3080 }
3081
3082 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3083         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3084         int r;
3085
3086         assert(manager);
3087         assert(unit);
3088         assert(job);
3089
3090         r = sd_bus_call_method(
3091                         manager->bus,
3092                         "org.freedesktop.systemd1",
3093                         "/org/freedesktop/systemd1",
3094                         "org.freedesktop.systemd1.Manager",
3095                         "StopUnit",
3096                         error,
3097                         &reply,
3098                         "ss", unit, "fail");
3099         if (r < 0) {
3100                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3101                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3102
3103                         *job = NULL;
3104                         sd_bus_error_free(error);
3105                         return 0;
3106                 }
3107
3108                 return r;
3109         }
3110
3111         return strdup_job(reply, job);
3112 }
3113
3114 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3115         _cleanup_free_ char *path = NULL;
3116         int r;
3117
3118         assert(manager);
3119         assert(scope);
3120
3121         path = unit_dbus_path_from_name(scope);
3122         if (!path)
3123                 return -ENOMEM;
3124
3125         r = sd_bus_call_method(
3126                         manager->bus,
3127                         "org.freedesktop.systemd1",
3128                         path,
3129                         "org.freedesktop.systemd1.Scope",
3130                         "Abandon",
3131                         error,
3132                         NULL,
3133                         NULL);
3134         if (r < 0) {
3135                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3136                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3137                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3138                         sd_bus_error_free(error);
3139                         return 0;
3140                 }
3141
3142                 return r;
3143         }
3144
3145         return 1;
3146 }
3147
3148 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3149         assert(manager);
3150         assert(unit);
3151
3152         return sd_bus_call_method(
3153                         manager->bus,
3154                         "org.freedesktop.systemd1",
3155                         "/org/freedesktop/systemd1",
3156                         "org.freedesktop.systemd1.Manager",
3157                         "KillUnit",
3158                         error,
3159                         NULL,
3160                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3161 }
3162
3163 int manager_unit_is_active(Manager *manager, const char *unit) {
3164         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3165         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3166         _cleanup_free_ char *path = NULL;
3167         const char *state;
3168         int r;
3169
3170         assert(manager);
3171         assert(unit);
3172
3173         path = unit_dbus_path_from_name(unit);
3174         if (!path)
3175                 return -ENOMEM;
3176
3177         r = sd_bus_get_property(
3178                         manager->bus,
3179                         "org.freedesktop.systemd1",
3180                         path,
3181                         "org.freedesktop.systemd1.Unit",
3182                         "ActiveState",
3183                         &error,
3184                         &reply,
3185                         "s");
3186         if (r < 0) {
3187                 /* systemd might have droppped off momentarily, let's
3188                  * not make this an error */
3189                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3190                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3191                         return true;
3192
3193                 /* If the unit is already unloaded then it's not
3194                  * active */
3195                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3196                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3197                         return false;
3198
3199                 return r;
3200         }
3201
3202         r = sd_bus_message_read(reply, "s", &state);
3203         if (r < 0)
3204                 return -EINVAL;
3205
3206         return !streq(state, "inactive") && !streq(state, "failed");
3207 }
3208
3209 int manager_job_is_active(Manager *manager, const char *path) {
3210         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3211         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3212         int r;
3213
3214         assert(manager);
3215         assert(path);
3216
3217         r = sd_bus_get_property(
3218                         manager->bus,
3219                         "org.freedesktop.systemd1",
3220                         path,
3221                         "org.freedesktop.systemd1.Job",
3222                         "State",
3223                         &error,
3224                         &reply,
3225                         "s");
3226         if (r < 0) {
3227                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3228                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3229                         return true;
3230
3231                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3232                         return false;
3233
3234                 return r;
3235         }
3236
3237         /* We don't actually care about the state really. The fact
3238          * that we could read the job state is enough for us */
3239
3240         return true;
3241 }
3242 #endif // 0